Chains and heterogens:
PDB Chain Sequences:
>1kr0A (A:) ggiaiywgqngnegtltqtcstrkysyvniaflnkfgngqtpqinlaghcnpaaggctiv sngirscqiqgikvmlslgggigsytlasqadaknvadylwnnflggksssrplgdavld gidfaiehgstlywddlarylsayskqgkkvyltaapqcpfpdrylgtalntglfdyvwv qffnnppcqyssgninniinswnrwttsinagkiflglpaapeaagsgyvppdvlisril peikkspkyggvmlwskfyddkngysssildsv